package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.CategoryDTO;
import com.sky.dto.CategoryPageQueryDTO;
import com.sky.entity.Category;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.CategoryMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.CategoryService;
import lombok.extern.slf4j.Slf4j;
import org.apache.ibatis.annotations.Delete;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;

@Service
@Slf4j
public class CategoryServiceImpl implements CategoryService {

    @Autowired
    private  CategoryMapper categoryMapper;
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private SetmealMapper setmealMapper;

    /**
     * 新增分类
     * @param categoryDTO
     * @return
     */
    @Override
    public void addCategory(CategoryDTO categoryDTO) {
        // 创建分类实例
        Category category = new Category();
        // 拷贝属性
        BeanUtils.copyProperties(categoryDTO,category);
        // 默认状态设置为禁用状态
        category.setStatus(StatusConstant.DISABLE);
        // 设置创建时间
        category.setCreateTime(LocalDateTime.now());
        // 设置更新时间
        category.setUpdateTime(LocalDateTime.now());
        // 设置创建人
        category.setCreateUser(BaseContext.getCurrentId());
        // 设置更新人
        category.setUpdateUser(BaseContext.getCurrentId());
        // 调用Mapper层新增分类
        categoryMapper.insert(category);
    }

    /**
     * 分页查询分类
     * @param categoryPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(CategoryPageQueryDTO categoryPageQueryDTO) {
        // 处理分页参数
        PageHelper.startPage(categoryPageQueryDTO.getPage(),categoryPageQueryDTO.getPageSize());
        // 调用Mapper层分页查询分类
        Page<Category> page = categoryMapper.pageQuery(categoryPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }

    /**
     * 删除分类
     * @param id
     * @return
     */
    @Override
    public void deleteCategory(Long id) {
       //  查询当前分类下是否关联了菜品
        Integer count = dishMapper.countByCategoryId(id);
        if(count > 0) {
            //当前分类下有菜品，不能删除
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_DISH);
        }
        // 查询当前分类下是否关联了套餐
        count = setmealMapper.countByCategoryId(id);
        if(count > 0) {
            //当前分类下有菜品，不能删除
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_SETMEAL);
        }

        // 删除分类数据
        categoryMapper.deleteById(id);
    }

    /**
     * 修改分类
     * @param categoryDTO
     */
    @Override
    public void update(CategoryDTO categoryDTO) {
        // 封装数据
        Category category = new Category();
        BeanUtils.copyProperties(categoryDTO,category);
        // 修改分类数据
        categoryMapper.update(category);
    }

    /**
     * 切换分类状态
     * @param status
     * @param id
     */

    @Override
    public void changeStatus(Integer status, Long id) {
        // 封装数据
        Category category = Category.builder()
                .id(id)
                .status(status)
                .updateTime(LocalDateTime.now())
                .updateUser(BaseContext.getCurrentId())
                .build();
        // 修改分类数据
        categoryMapper.update(category);
    }

    /**
     * 根据类型查询分类
     * @param type
     * @return
     */
    @Override
    public List<Category> list(Integer type) {

        return categoryMapper.list(type);
    }
}
